Advances in Chemistry Research. Volume 49 e-bog

Water pollution by organic dyestuffs is a major environmental issue to be addressed, given the strong negative impact of such molecules due to both their direct toxicity and that of their derivatives. As such, there is a growing interest regarding possible implementation of advanced oxidation processes in conventional wastewater treatments. Following this, the process of oxidation-reduction is conducted in electrodes/membranes based on teflonized carbon blacks/carbons. A physical model of the reaction mechanism in carbon-teflon structure is developed, and three types of processes have been studied: SO2 oxidation with O2 reduction; H2S oxidation with O2 reduction; and H2S oxidation with SO2 reduction. The authors aim to update the knowledge in the field by presenting in a systematic approach the scientific literature data concerning the applications of cyanoethylation focusing on the catalytic aspects of the process. Aspects related to the most relevant reactions, the reaction conditions and the catalysts employed for each of them are presented. In closing, numerical simulation of shock wave phenomena in supersonic compressible flows is discussed. The test cases considered include supersonic flow in a channel with a forward-facing step, reflection of a shock wave from a wall, shock wave and laminar boundary layer interaction.